Guitar headstock



FIG. 1 is a top perspective view of a guitar headstock showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side elevational view of the lower side of the guitar headstock;

FIG. 4 is a side elevational view of the right side of the guitar headstock; and,

FIG. 5 is a bottom plan view thereof.

The broken line showing is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a guitar headstock, as shown and described. 